Year	Percent change
1980	18.483
1981	12.853
1982	-1.486
1983	10.085
1984	14.666
1985	6.776
1986	13.395
1987	28.534
1988	24.618
1989	8.435
1990	11.416
1991	17.689
1992	20.437
1993	11.887
1994	12.949
1995	12.169
1996	4.389
1997	6.923
1998	-5.727
1999	-0.511
2000	17.183
2001	-0.988
2002	7.107
2003	11.693
2004	14.467
2005	9.314
2006	9.854
2007	9.13
2008	3.295
2009	-7.929
2010	18.359
2011	5.677
2012	4.258
2013	8.318
2014	1.038
2015	-1.786
2016	0.868
2017	6.619
2018	4.544
2019	2.469
2020	3.062
2021	3.477
2022	3.681
2023	3.749
2024	3.823